Multipass mask issues

[comotion]

Hi all,

I have a small problem with multipass mask when rendering hair material. The corona material it self has a mask on it, but that doesn't seem be transferred to the multipass mask.

C4D internal render makes masks just fine. Am I missing something?

[Beanzvision]

Hi there,

Can you tell me what passes you are using? Are you able to share your scene with us via our private uploader?
https://corona-renderer.com/upload

[comotion]

Hi again,

I have uploaded the file: 1644420455_corona-hairtest.zip

One thing I noticed when removing all unnecessary elements is that the plain alpha works fine. But I have a backdrop that covers the entire background.

Thanks,
Mads